Mathematics – Rings and Algebras
Scientific paper
2005-07-25
Int. J. Algebra Comput. 17(4) (2007) 661-714.
Mathematics
Rings and Algebras
52 pages
Scientific paper
Let $\mathbb{F}$ be the underlying base field of characteristic $p>3 $ and denote by $\mathcal{W}$ and $\mathcal{S}$ the even parts of the finite-dimensional generalized Witt Lie superalgebra $W$ and the special Lie superalgebra $S,$ respectively. We first give the generator sets of the Lie algebras $\mathcal{W}$ and $\mathcal{S}.$ Using certain properties of the canonical tori of $\mathcal{W}$ and $\mathcal{S},$ we then determine the derivation algebra of $\mathcal{W}$ and the derivation space of $\mathcal{S} $ to $\mathcal{W},$ where $\mathcal{W}$ is viewed as $\mathcal{S} $-module by means of the adjoint representation. As a result, we describe explicitly the derivation algebra of $\mathcal{S}.$ Furthermore, we prove that the outer derivation algebras of $\mathcal{W}$ and $\mathcal{S} $ are abelian Lie algebras or metabelian Lie algebras with explicit structure. In particular, we give the dimension formulae of the derivation algebras and outer derivation algebras of $\mathcal{W}$ and $\mathcal{S}.$ Thus we may make a comparison between the even parts of the (outer) superderivation algebras of $W$ and $S$ and the (outer) derivation algebras of the even parts of $W$ and $S,$ respectively.
Liu Wende
Zhang Yongzheng
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